Argaian hemioliaCanonLegendsInfinities Argaian hemiolia were first mentioned in The Essential Guide to Warfare, a reference book released in 2012 and written by Jason Fry. Behind the scenes Argaian hemiolia were first mentioned in The Essential Guide to Warfare, a reference book released in 2012 and written by Jason Fry. Sources The Essential Guide to WarfareAppearances